JP2009203446A - Adhesive composition for capturing small creature - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesive composition for capturing small creatures which has a good adhesive power, is easy to handle as a coating to be applied into a material to be coated, is made of a raw material which is easily obtainable, and has excellent workability when made into an adhesive composition. <P>SOLUTION: A composition comprising (A) 70-98 mass% of a liquid state polybutene having a number-average molecular weight of 200-1200, (B) 1.0-8.0 mass% of a high pressure produced-polyethylene having a melt index of 0.04-35, (C) 1.0-8.0 mass% of a butyl rubber having a Mooney viscosity ML<SB>1+8</SB>(125°C) of 30-60, and (D) 5-29 mass% of an alicyclic hydrocarbon resin constitutes an adhesive composition for capturing small creatures. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an adhesive composition suitable for capturing small organisms such as mice, cockroaches and flies.

  Exterminating harmful small organisms such as rats, cockroaches and flies is an important issue from the viewpoint of improving the living environment. In particular, the damage caused by rodents is enormous. Among them, rats can eat not only agricultural products and food, but also break the lead pipe to cause gas leakage, or expose the power line to cause a fire. Several methods for extermination of these small organisms have been proposed and implemented, but the simplest of them is a sticky capture agent such as cardboard, cardboard, wood board, plastic film, There is a method in which it is applied to a material to be applied such as a sheet and installed in a passage for small organisms. In this case, it is necessary to satisfy the requirement that the capture agent is excellent in application workability and adhesiveness. In addition, when pre-applied to the material to be coated, the trapping agent flows out of the material to be coated during storage or use, or penetrates into the material to be spread and becomes unusable. There should be no such things as becoming dirty or soiling the floor.

  As this kind of small organism capture agent, for example, a composition comprising 86% polybutene, 10% butyl rubber and 4% paraffin as an anti-sagging agent (Patent Document 1), 80 parts polybutene, 10 parts butyl rubber and rosin, silica gel, polyethylene 2 to 40 parts by weight of organic bentonite or colloidal to 100 parts by weight of a composition comprising 40 parts in total (Patent Document 2), polyisobutene (viscosity of 1000 poise at 50 ° C.) or 80:20 mixture of polyisobutene and natural rubber, respectively A composition comprising 0.5 to 8 parts by mass of silica (Patent Documents 3 and 4), a composition comprising 5% by mass of butyl rubber, 35% by mass of polybutene, and 60% by mass of rosin ester, toluene, and xylene. Patent document 5) etc. are disclosed. Further, a composition comprising 80% by mass of polybutene, 16% by mass of butyl rubber and 4% by mass of polyethylene (Patent Document 6), a mixture of two kinds of liquid polybutenes having different molecular weights, 80 to 98% by mass, and a viscosity average molecular weight of 100 A composition comprising 1 to 10% by mass of 10,000 to 2.5 million polyisobutylene rubber and 1 to 10% by mass of high-pressure polyethylene having specific properties is disclosed (Patent Document 7).

However, none of these examples meet all of the above requirements. Specifically, in a composition using paraffin wax, the addition of a small amount is not sufficient to prevent the flow-out, whereas if a sufficient amount is added, the wax content of the adhesive layer increases with the passage of time after application. Since it moves to the surface and reduces the adhesive force, the capture ability is significantly reduced. In the composition using expensive organic bentonite or silica, it is relatively good in terms of prevention of flow-out and adhesive strength. However, these powders are bulky and involve air during mixing, and defoamed after mixing. This is not preferable from the viewpoint of labor and cost during production.
Further, a composition comprising butyl rubber, polybutene, rosin ester, toluene, and xylene has a problem of odor because it uses a volatile aromatic solvent. Furthermore, the problem is that the coating film coated with the adhesive composition is installed for capturing small organisms, the solvent is volatilized over a long period of time, the coating film is cured, and the capturing ability is lowered. Further, a composition comprising polybutene, butyl rubber and polyethylene cannot satisfy both the tackiness of the tacky composition and the workability during the coating operation.
Also, those using polyisobutylene rubber disclosed in JP-A-2007-177104 have excellent adhesion, but the molecular weight of polyisobutylene rubber is very large, so that it is kneaded and dissolved in polybutene. It has the disadvantage of taking time. Polyisobutylene rubber has a limited supply source and is expensive and has a problem in stable supply. In addition, it requires a lot of work, such as using two types of liquid polybutene.
Japanese Patent Publication No. 48-16617 JP-A-52-105217 JP 51-125123 A Japanese Patent Publication No.53-18586 JP 52-98161 A Japanese Examined Patent Publication No. 2-57521 JP 2007-177104 A

  The object of the present invention is excellent in tackiness for capturing small organisms, excellent in workability during the production of the adhesive composition or during the application of the produced adhesive composition, and moreover, the adhesive composition after application It is an object of the present invention to provide an adhesive composition for capturing small organisms that has excellent performance in response to various requests such as the absence of a material flow, and that is easy to obtain raw materials and is inexpensive.

The present invention
(A) 70-98% by mass of liquid polybutene having a number average molecular weight of 200-1200, and (B) 1.0-8.0% by mass of high-pressure polyethylene having a melt index of 0.04-35,
(C) Mooney viscosity ML _{1 + 8} (125 ° C.) 30 to 60 butyl rubber 1.0 to 8.0 mass%, and (D) alicyclic hydrocarbon resin 5 to 29 mass% (total 100 mass) %). The present invention relates to an adhesive composition for capturing small organisms.

  According to the present invention, by adding an alicyclic hydrocarbon resin to a composition comprising liquid polybutene, polyethylene, and butyl rubber, compared with a composition comprising conventional polybutene, polyethylene, butyl rubber, rosin, or silica gel, Excellent adhesiveness to living organisms, excellent workability at the time of manufacture and workability of the adhesive composition application work, etc., and low cost and excellent performance without any drawbacks such as the flow of adhesive composition after application An adhesive composition for capturing small organisms can be provided.

Hereinafter, the present invention will be described in more detail.
The liquid polybutene (A) used in the present invention has a number average molecular weight in the range of 200 to 1200. A more preferred number average molecular weight range is 400-1200. This liquid polybutene can be produced, for example, by polymerizing a butane-butene fraction excluding butadiene in a so-called C4 fraction produced by naphtha decomposition. These polybutenes are commercially available, for example, under the trade name Nisseki Polybutene (Shin Nippon Oil Co., Ltd.). When the number average molecular weight of the polybutene is smaller than 200, the flash point becomes low, so that the safety when the present adhesive composition is produced or used in a place with a fire such as a cooking place is lowered. Moreover, since the adhesive force of the obtained adhesive composition falls, it is not preferable. On the other hand, if the number average molecular weight is larger than 1200, the melt viscosity of the pressure-sensitive adhesive composition becomes too high, and a smooth coating operation is impossible.

  The high-pressure polyethylene means a polymer obtained by polymerizing ethylene alone or ethylene and another olefin (for example, butene, pentene, hexene, etc.) in a high-pressure polymerization method, and having a density of 0.92 to 0.93. The high-pressure polyethylene (B) used in the present invention has a melt index of 0.04 to 35, preferably 0.1 to 20. Those with a melt index less than 0.04 require a high temperature and a long time for dissolution in liquid polybutene, and those with a melt index greater than this range are sufficient in tackiness, capture agent flow prevention effect and bleeding prevention effect. Cannot be obtained. The high-pressure polyethylene can be obtained by using, for example, the trade name Novatec LJ600 (Nippon Polyethylene Co., Ltd.). The high pressure polyethylene may be used alone or in combination.

The (C) butyl rubber used in the present invention is butyl rubber having a Mooney viscosity ML _{1 + 8} (125 ° C.) of 30 to 60, preferably 45 to 55. These butyl rubbers are commercially available, for example, under the trade name BUTYL268 (manufactured by JSR Corporation). When Mooney viscosity ML1 _{+ 8} (125 degreeC) is smaller than 30, the adhesive force of the manufactured adhesive composition is inadequate, and the capture property with respect to a small organism falls. On the other hand, when it is larger than 60, it takes time to dissolve in polybutene, and the melt viscosity of the produced pressure-sensitive adhesive composition becomes very high, so that it is difficult to smoothly apply to the surface of the material to be coated.

  The (D) alicyclic hydrocarbon resin used in the present invention is a resin or alkenyl aromatic hydrocarbon obtained by polymerizing an alicyclic olefin compound such as cyclopentadiene or alkylcyclopentadiene using an acid catalyst. Examples thereof include resins obtained by polymerization using a catalyst and then nuclear hydrogenation of an aromatic ring. These alicyclic hydrocarbon resins are commercially available, for example, under the trade name Escorez 5300 (manufactured by Exxon Mobile Chemical).

  The blending ratio of the liquid polybutene in the present invention is 70 to 98% by mass, preferably 75 to 85% by mass with respect to the entire composition. If the blending ratio of the liquid polybutene is less than 70% by mass, the extensibility of the coating film is lowered and the coating processability tends to be inferior, such as generation of surface irregularities. On the other hand, if it exceeds 98% by mass, the flow resistance of the coating film tends to be inferior.

  The blending ratio of the high pressure polyethylene in the present invention is 1.0 to 8.0% by mass, preferably 2.0 to 6.0% by mass, more preferably 3.0 to 4.5% by mass, based on the entire composition. Range. When the blending ratio is less than 1.0% by mass, the flow-out resistance of the coating film is inferior. On the other hand, when it is larger than 8.0% by mass, the coating film formability is deteriorated and the processability of the coating film is inferior, such as the formation of surface irregularities.

  The blending ratio of butyl rubber is 1.0 to 8.0% by mass, preferably 2.0 to 6.0% by mass, and more preferably 2.5 to 4.5% by mass with respect to the entire composition. When the blending ratio is less than 1.0% by mass, sufficient adhesive strength cannot be obtained, and when it is greater than 8.0% by mass, the melt viscosity becomes extremely large and the processability at the time of coating is poor.

  In the present invention, it is necessary to add an alicyclic hydrocarbon resin as a constituent component in addition to the above three components. By using an alicyclic hydrocarbon resin, it is possible to obtain a pressure-sensitive adhesive composition that is excellent in both adhesive strength and workability during coating. In the case where an adhesive composition is produced without using an alicyclic hydrocarbon resin, when trying to obtain a composition having excellent workability at the time of application, the composition is only inferior in adhesive strength. On the other hand, when a composition with satisfactory adhesive strength is produced without using an alicyclic hydrocarbon resin, the composition has an extremely large melt viscosity and is inferior in coating workability, both of which are the object of the present invention. An adhesive composition excellent in both adhesive strength and workability during application cannot be obtained. The blending ratio of the alicyclic hydrocarbon resin is from 5 to 29% by mass, preferably from 7 to 20% by mass, and more preferably from 9 to 15% by mass, based on the entire composition. If the blending ratio is less than 5% by mass, the melt viscosity of the pressure-sensitive adhesive composition becomes too high, resulting in problems in applicability, and if it exceeds 29% by mass, the melt viscosity becomes too low. Inferior property is not preferable. Moreover, the adhesive force of the coating film is low, which causes a problem in the capture performance of small organisms.

The pressure-sensitive adhesive composition of the present invention can be produced by melt-kneading the components (A) to (D). The method of melt kneading is not particularly limited, and can be performed using a known method. For example, a method of forcibly stirring using a kneader can be used under a temperature condition where the components (A) to (D) are melted. As mixing kneading device hook or the like with known stirring blade is preferably used.
As a kneading method, for example, a method is preferably used in which liquid polybutene as a main component is heated, and other components are added sequentially or simultaneously thereto. A preferable temperature range for performing this series of operations is 160 ° C to 170 ° C. The working time is appropriately adjusted according to the quantity, but is preferably 5 to 7 hours.

  In addition, as a method for applying the obtained adhesive composition to a substrate, any of the known doctor knife method, doctor blade method and the like can be preferably used. The temperature of the adhesive composition at the time of application is preferably 160 ° C to 170 ° C.

Since the composition of the present invention does not use an organic solvent and does not have a specific odor, mice are not repelled and the effect of the attractant is not inhibited. Further, since a bulky filler such as bentonite or silica is not used, there is no problem of causing foaming during the kneading operation and making it difficult to continue the manufacturing operation. The adhesive composition of the present invention is not only effective for capturing rodent small organisms such as mice, but also can be used for capturing other harmful small organisms such as cockroaches.
The pressure-sensitive adhesive composition of the present invention is a process oil, animal and vegetable oil, a polymer plasticizer, a softening agent, if necessary, in addition to the above essential constituents, within a range that does not impair the required performance depending on the application to be applied. An agent, a colorant, an antioxidant, an anti-aging agent, a fragrance, an attractant, a feed and the like can be appropriately blended.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples.

<Examples 1-3 and Comparative Examples 1-6>
Various adhesive compositions were prepared according to the blending ratios shown in Table 1 using the materials shown below.
Butyl rubber: JSR BUTYL268, Mooney viscosity ML _{1 + 8} (125 ° C) 51
Polyisobutylene rubber: Vistanex L-120 manufactured by Exxon Mobil Chemical, weight average molecular weight 1.66 million high-pressure polyethylene; Nippon Polyethylene Corporation, Novatec LJ600, MFR5.5, density 0.93, melting point (DSC method) 108 ° C
Liquid polybutene A: Nippon Petrochemical Co., Ltd., Nisseki Polybutene HV-100, number average molecular weight 980
Liquid polybutene B: Nippon Petrochemical Co., Ltd., Nisseki Polybutene HV-300, number average molecular weight 1400
Alicyclic hydrocarbon resin A; Escorez 5300, Exxon Mobil Chemical Co., melting point 105 ° C
Aliphatic hydrocarbon resin B; Escorez 1304, Exxon Mobil Chemical Co., melting point 100 ° C

  The method for preparing the adhesive composition is as follows. That is, other components were sequentially added to the liquid polybutene heated to 170 ° C., and the temperature was maintained at 170 ° C. and stirred until each component was uniformly dissolved. Comparative Example 4 uses a polyisobutylene rubber disclosed in JP-A-2007-177104 and has excellent adhesive strength. However, since the molecular weight of the polyisobutylene rubber is very large, it is kneaded and mixed with polybutene. It took significantly longer time to dissolve in the sample than in the other examples. Next, the melt viscosity and adhesive strength performance of these adhesive compositions was evaluated. The evaluation results are shown in Table 1. The evaluation method is as follows.

<Evaluation method>
Melt viscosity: The melt viscosity at 160 ° C. was measured according to JIS-K7117. The melt viscosity affects the workability when the adhesive composition is applied to the surface to be applied. In the table, in addition to the numerical value of the melt viscosity, the evaluation of the coating performance is also shown. Evaluation was performed as follows. That is, the adhesive composition at 170 ° C. was applied to the surface of the mount with a thickness of 2 mm using a stainless steel mold punched to a predetermined size. The adhesive composition was uniformly applied without being too hard, and the adhesive composition did not flow out during or after application (◯). The pressure-sensitive adhesive composition was too hard to apply uniformly (×). Flowing out of the adhesive composition during or after the coating operation was observed (Δ).
Finger touch tack: A finger was brought into contact with the surface of the pressure-sensitive adhesive composition coated on the coated surface, and the finger touch tack was examined.
Evaluation x: Almost no adhesion to fingers. Further, there is no elongation and no rubber elasticity.
Δ: Although it adheres to the finger, it lacks rubber elasticity.
○: Adhered to the finger, stretched and rubber elastic.
Adhesive strength: In accordance with the probe tack method (JIS-Z0237 supplementary matter), the force required to bring the adhesive composition applied to the coated surface into contact with the end surface of a metal column having a diameter of 5 mm and to pull the metal column away from the coated surface Was measured with a tensile tester at 23 ° C. Adhesive strength affects the capture performance of small organisms.

  As is apparent from Table 1, the adhesive compositions of the present invention shown in Examples 1 to 3 comprising liquid polybutene, high-pressure polyethylene, butyl rubber, and alicyclic hydrocarbon resin have an appropriate melt viscosity, Good finger touch and adhesion. That is, it excels in both the capture of small organisms and the workability during application. Moreover, by comparing Examples 1-3, it turns out that it can adjust to desired adhesive force and melt viscosity by adjusting the mixture ratio of an alicyclic hydrocarbon resin.

On the other hand, Comparative Example 1 in which no alicyclic hydrocarbon resin is blended is excellent in workability at the time of application, but is inferior in adhesive strength. In Comparative Example 2, in which the blending ratio of butyl rubber was increased and the liquid polybutene having a large viscosity was used in combination with the adhesive strength in Examples 1 and 2, the adhesive strength was excellent, but the melt viscosity was large. Inferior workability. Further, Comparative Example 3 using an aliphatic hydrocarbon resin instead of the alicyclic hydrocarbon resin as the hydrocarbon resin is excellent in workability at the time of coating, but is inferior in adhesive strength, and is derived from the resin B. The odor of the sticky material was also strong. Comparative Example 4 is currently marketed and is widely used as an adhesive composition for capturing small organisms, and has an excellent track record in both adhesive strength and coating workability. As is apparent from the table, Examples 1, 2 and 3 have adhesive strength and coating workability which are not inferior to those of Comparative Example 4. Further, in Comparative Example 4, an ultra high molecular weight polyisobutylene rubber is used instead of the butyl rubber of the present application. Therefore, as shown in Table 1, it took a long time until the kneaded product became uniform during the kneading operation, and there was a problem in workability during the production of the adhesive composition. Also, it is necessary to use two types of liquid polybutenes, and the manufacturing work is complicated in this respect as well.
Moreover, the composition (Comparative Example 5) in which the use ratio of the alicyclic hydrocarbon resin is too small has a problem that the melt viscosity is too high and the coating workability is poor. Moreover, the compound (Comparative Example 6) in which the use ratio of the alicyclic hydrocarbon resin is too large is such that the coated surface is too hard. In addition, since the viscosity at the time of melting is too low, the spread becomes too large during the coating operation, and it has been difficult to maintain the shape.
On the other hand, the pressure-sensitive adhesive composition of the present invention exemplified in Examples 1, 2, and 3 is excellent in both workability at the time of coating work and small organism capture performance. In addition, the time required for homogenization during the production of the adhesive composition is short, and the workability during the production is also excellent. In addition, the coating film after coating on the material to be coated does not flow out during installation in the small organism capture place, does not ooze out on the material to be coated, becomes unusable, and does not stain the surroundings, and the coating film can be preserved. It was excellent.

ADVANTAGE OF THE INVENTION By this invention, the adhesive composition which has the capture property outstanding with respect to rodent small organisms, such as a rat, can be provided. Moreover, the adhesive composition for capturing small organisms of the present invention can be economically produced because of its excellent workability during production. Furthermore, since the adhesive composition is excellent in application workability, the application work to the material to be applied can be carried out economically.
From these, the adhesive composition for capturing small organisms of the present invention can efficiently and economically control rodent small organisms such as mice, and thereby produce agricultural products and foods by these rodent small organisms. Damage, as well as damage to lead pipes and power lines can be prevented economically and effectively.

Claims (1)

(A) 70-98% by mass of liquid polybutene having a number average molecular weight of 200-1200, and (B) 1.0-8.0% by mass of high-pressure polyethylene having a melt index of 0.04-35,
(C) Mooney viscosity ML _{1 + 8} (125 ° C.) 30 to 60 butyl rubber 1.0 to 8.0 mass%, and (D) alicyclic hydrocarbon resin 5 to 29 mass% (total 100 mass) %)), A sticky composition for capturing small organisms.